什么时候应该使用HTML实体? [英] When should one use HTML entities?

问题描述

这已经使我困惑了一段时间.随着UTF-8作为Web开发中的实际标准的出现，我不确定在哪种情况下应该使用HTML实体，对于哪种情况我应该仅使用UTF-8字符.例如，

This has been confusing me for some time. With the advent of UTF-8 as the de-facto standard in web development I'm not sure in which situations I'm supposed to use the HTML entities and for which ones should I just use the UTF-8 character. For example,

• 破折号(–，&emdash;)
• &符(& ;, &)
• 3/4分数(¾，¾)

• em dash (–, &emdash;)
• ampersand (&, &)
• 3/4 fraction (¾, ¾)

请阐明此问题.将不胜感激.

Please do shed light on this issue. It will be appreciated.

推荐答案

如果您的编辑器支持Unicode，则通常不需要使用HTML字符实体.在以下情况下，实体会很有用:

You don't generally need to use HTML character entities if your editor supports Unicode. Entities can be useful when:

• 您的键盘不支持您需要输入的字符.例如，许多键盘没有破折号或版权符号.
• 您的编辑器不支持Unicode(几年前很常见，但今天可能不常见).
• 您想在源代码中明确说明正在发生的事情.例如， 代码比相应的空白字符更清晰.
• 您需要转义HTML特殊字符，例如<，&或".

• Your keyboard does not support the character you need to type. For example, many keyboards do not have em-dash or the copyright symbol.
• Your editor does not support Unicode (very common some years ago, but probably not today).
• You want to make it explicit in the source what is happening. For example, the   code is clearer than the corresponding white space character.
• You need to escape HTML special characters like <, &, or ".

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